Janito me andaba preguntando por unos valores en ascii asi que hicimos un script, aver si les sirve.
<table style="text-align: left;" border="1" cellpadding="2" cellspacing="2">
<tbody>
<tr>
<td style="vertical-align: top;">
<table style="text-align: left;" border="1" cellpadding="2" cellspacing="2">
<tbody>
<tr>
<td>Visible</td>
<td>Decimal</td>
<td>Hexadecimal</td>
<td>Octalh</td>
<td>Htmlentities</td>
</tr>
<?php
for($caracter= 0;$caracter<=10000;$caracter++){
echo '
<tr>
<td>&#'.$caracter.';</td>
<td>'.(int)$caracter.'</td>
<td>'.dechex($caracter).'</td>
<td>'.(int)decoct($caracter).'</td>
<td>&#'.$caracter.';</td>
</tr>
';
}
?>
</tbody>
</table>
</td>
<td style="vertical-align: top;">
<table style="text-align: left;" border="1" cellpadding="2" cellspacing="2">
<tbody>
<tr>
<td>Visible</td>
<td>Decimal</td>
<td>Hexadecimal</td>
<td>Octalh</td>
<td>Htmlentities</td>
</tr>
<?php
for($caracter= 10000;$caracter<=20000;$caracter++){
echo '
<tr>
<td>&#'.$caracter.'; </td>
<td>'.(int)$caracter.' </td>
<td>'.dechex($caracter).' </td>
<td>'.(int)decoct($caracter).' </td>
<td>&#'.$caracter.'; </td>
</tr>
';
}
?>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>